Oiler for percussive tools



June 20, 1950 P. H; MAST. 2,512,366

OILER FOR PERCUSSIVE TQOLS Filed Oct. 14, 1947 FIG-.2

PAUL H. NAST INVENTOR.

Patented June 20, 1950 ,Paul H. Nast, WcstS pringfield, Mass., assignor to Worthington Pump and Machinery Corpora tion, Harrison,

N. J a corporation of Delaware Application October 14, 1947, Serial No. 779,731

2 Claims. (01. 184-55) This invention relates to oilers for percussivetools and more particularly to what is known in the art of percussive tools as a line oiler. Line -oilers as known in the percussive tool art are containers for a lubricant, which are connected in the supply line of pressure air to the tool so that as the pressure air flows to the tool it carries an atomized quantity of lubricating oil along with it and oils or lubricates the working parts of the tool.

An object of the present invention is to provide a line oiler for percussive tools which will have ample capacity to provide proper and complete ,lubricationof a tool for a full working day without necessitating refilling of the oiler.

Another object of the present invention is to provide a line oiler as specified which embodies means for positively regulating the discharge of oil therefrom so as to prevent too rapid emptying of the oiler and also prevent restriction of the discharge of a suflicient or required quantity of oil, either of which results in improper lubrication of the tool with the consequent heavy wear on tool parts.

With these and other objects in view, as may appear from the accompanying specification, the invention consists of various features of construction and combination of parts, which will be first described in connection with the accompanying drawings, showing an oiler for percussive tools of a preferred form embodying the invention, and the features forming the invention will be specifically pointed out in the claims.

In the drawings:

Figure 1 is a vertical section through the improved line oiler.

Figure 2 is a vertical section through the improved line oiler taken at right angles to the view shown in Figure 1.

Referring more particularly to the drawings, the improved line oiler comprises the reservoir shell or casing I which may be of any desired shape and which has a conduit 2, circular in cross section, formed thereon and extending diametrically through the casing I near the bottom of the casing. The conduit 2 forms a passage for conducting live pressure air through the line oiler for delivery to a percussive tool of any suitable type.

A valve casing 3 is located within the shell I, extends diametrically through the conduit 2 and projects upwardly into the hollow interior of the shell I. The valve casing 3 is provided with a vertical bore 4 extending downwardly thereinto from its upper end which has a valve stem 5 positioned therein. The valve stem 5 is slightly smaller in diameter than the diameter of the bore 4 and it has a reduced lower end 6 which terminates in a needle valve I. The needle valve l cooperates with a valve seat 8 and the valve stem 5 is adjustably carried by the valve casing 3 through the medium of threaded portions 9 so as to permit adjustment of the needle valve 1 to or from the valve seat 8.

The valve casing 3 has a transversely extending opening Ill extending therethrough which communicates at both its ends with the conduit 2 and also communicates with the lower reduced portion I2 of the bore 4 of the valve casing 3. The valve seat 8 has a relatively small opening therein which communicates with a correspondingly small passageway I3 formed in the valve casinglfl below the valve seat. The passageway I3 opens into a cavity I4 in which is mounted a filtering pad I5 of felt or the like. A removable plugI-B is carried by the lower end of the valve casing3 and it is provided with a passageway I! which opens into the interior of the shell I near the bottom of the shell and into the chamber I4 for delivering oil from the reservoir formed in the casing I into the conduit 2 for delivery to a percussive tool. A cleaning plug I8 is removably carried by the casing I and a filler plug I9 is removably carried by the top of the casing I. The valve stem 5 is adjusted through the filling opening normally closed by the filler plug I 9.

In operation, the oil liner is connected in the pressure air supply line to a percussive tool and, due to the piston action of the percussive tool, the pressure air flows through the conduit 2 in a pulsating action and in along even lines. The

sharp exhaust at the percussive tool causes the air pressure in the line and in the conduit 2 to fluctuate. Air under pressure enters from the upstream side of the conduit 2 into and through the opening I0 and a relatively small quantity of this air under pressure flows upwardly through the bores I2 and 4 about the valve stem 5, and passes into and through the valve stem through the ports and passages 21] into the top of the casing I above the oil level in the reservoir. This pressure air acts as a head on the top of the oil in the reservoir and forces the oil through the passage I I, felt filtering plug i5 and the passage I3 past the needle valve I into the path of the pressure air sweeping through the opening II] where the oil is picked up by the air passing through the opening I0 and distributed to the down stream side of the conduit 2 from whence it is carried by the pressure air into a percussive tool. The valve 1 is adjusted to form the desired or required opening which will permit the passage of oil in regulated, restricted quantities, sufficient for the proper lubrication of the percussive tool with which the oiler is employed.

The fluctuation of the pressure of the pressure air in the conduit 2 results in the passage of oil through the opening l into the conduit 2.

That is, during the cycle of pulsation, when the pressure is high, a balanced condition exists and casing and having the portion of its length inwardly of the threads thereon slightly smaller than the bore in the valve casing, said valve stem provided with ports and passages to permit air entering the bore to flow about the valve stem and into the top of the reservoir, said casing provided with openings in its top and bottom aligning with said valve casing, and removable plugs in said openings.

the oil will not flow out of the passage I3 past rangement of parts shown, but that they may be widely modified withinthe invention defined by the claims.

What is claimed is:

1. In a line oiler for percussive tools, an oil reservoir including a casin a pressure air conduit formed upon and extending through said casing, said pressure air conduit provided with diametrically'opposed openings, a valve casing extending through said openings and provided with a longitudinal bore and with a, plurality of openings opening from said bore into said pressure air conduit, said bore opening out through its lower end into said oil reservoir, a, removable plug in said lower open end and provided with a relatively small passage to permit oil to flow from the reservoir into and through the valve casing, a valve seat in said valve casing, a filter in said valve casing between said plug and said valve seat, a valve stem threadably carried by said valve 2. In a line oiler for percussive tools, an oil reservoir including a casing, a pressure air conduit formed upon and extending through said casing, said pressure air conduit provided with diametricallyopposed openings, a valve casing extending through said openings and provided with a longitudinal bore and with a plurality of openings opening from said bore into said pressure air conduit, said bore opening out through its lower end into said oil reservoir, a removable 2o plug in said lower open end and provided with a top of said reservoir.

relatively small passagegto' permit oil to flow from the reservoirinto-and through the valve casing, a'valve seatii'n said valve-casing, a valvestem threadably carried by said valve casing and having the portion of; its length inwardly of the threads thereon slightly smallerthan. the bore in the valve tzaLsirigahdf-said valve stem provided with ports and passagest'opermit air entering the bore to flow about the valve stem and into the PAUL H. NAST.

P g Remittance sorrel) The following references J are of record in the file of this patent; v v y .sT-ATEsPA rENTs Number V Name r Date 1,598,456 Sohosky- Aug. 31, 1926 40 1,896,368 Pearson Feb. '7, 1933 2,225,324 Slater Dec. 17, 1940 

